Louis

This WordPress Plugin makes the default search also search based on meta data.
<ul>
<li>No setup required!</li>
</ul>

WP Search Include Meta Data

License: GPLv2 or later WordPress plugin to include post meta data when using the default search

Usman Ali Qureshi

MetaViewer helps developers and advanced users view all post meta and user meta data in a clear, organized table format. It supports custom post types and displays the data type of each value (string, integer, array, etc.).
This plugin is useful for debugging, development, or reviewing what’s stored in WordPress meta fields.
Key Features:
<ul>
<li>View post meta data on the edit screen of all post types.</li>
<li>View user meta data on user profile pages.</li>
<li>Clean tabular layout with zebra striping.</li>
<li>Auto-detects and displays data types (string, int, array, etc.).</li>
<li>Translation ready and lightweight.</li>
<li>Compatible with PHP 7.4 to 8.3.</li>
</ul>
<h3>License</h3>
This plugin is licensed under the GPLv2 or later.

MetaViewer – Debug Meta Data

View and debug post and user meta data in a clean table format – lightweight, dev-friendly, and works across post types in the WP admin.

WP Search Include Meta Data vs MetaViewer – Debug Meta Data